CN1097279C - Cell driving circuit for use in field emission display - Google Patents

Cell driving circuit for use in field emission display Download PDF

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Publication number
CN1097279C
CN1097279C CN96191650A CN96191650A CN1097279C CN 1097279 C CN1097279 C CN 1097279C CN 96191650 A CN96191650 A CN 96191650A CN 96191650 A CN96191650 A CN 96191650A CN 1097279 C CN1097279 C CN 1097279C
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CN
China
Prior art keywords
driving circuit
cell driving
gate electrode
vision signal
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN96191650A
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Chinese (zh)
Other versions
CN1169794A (en
Inventor
玄昌镐
权五敬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orion Electric Co Ltd Korea
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Orion Electric Co Ltd Korea
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orion Electric Co Ltd Korea filed Critical Orion Electric Co Ltd Korea
Publication of CN1169794A publication Critical patent/CN1169794A/en
Application granted granted Critical
Publication of CN1097279C publication Critical patent/CN1097279C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2011—Display of intermediate tones by amplitude modulation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/30—Cold cathodes
    • H01J2201/304—Field emission cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00—Electron emission display panels, e.g. field emission display panels

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Abstract

A cell driving circuit of an FED, including: an electrode plate (10) connected to ground potential, for installing a plurality of cathodes (C11 to C44) which serve to emit electrons; two or more gate electrodes (G1 to G4) disposed in the upper portion of the cathodes (C11 to C44); two or more switching units (T1 to T4) for switching voltages to be applied to the two or more gate electrodes (G1 to G4); and a control unit (20) for driving the number of the two or more switching units (T1 to T4) corresponding to size of a video signal (VS) in accordance with the size of the video signal (VS).

Description

The cell driving circuit that in field-emitter display, uses
The present invention relates to a kind of cathode ray tube (CRT), particularly relate to a kind of field-emitter display cell driving circuit of (after this being called " FED "), it can provide multi-stage grey scale and can realize simple manufacturing method for the pixel in the circuit structure of a simplification.
Cell driving circuit among the FED generally is the magnitude of current that flows to the negative electrode of a plurality of field emission apparatus by adjusting, or realizes multi-stage grey scale by driving time cycle of dividing a plurality of field emission apparatus.
Cell driving circuit among the FED of the method for the utilization adjusting magnitude of current needs a large amount of transistors that is used for the practical adjustments magnitude of current, makes circuit structure very complicated.In addition, because use simultaneously puts on the high voltage of gate electrode and the low-voltage that driving transistors needs, make manufacture method more complicated.
On the other hand, the cell driving circuit that utilizes the FED of the method for dividing the driving time cycle is disclosed in 5,135, No. 483 United States Patent (USP)s of Kishino application.This patent has proposed the cell driving circuit of a kind of FED, and wherein the time cycle of the current path of negative electrode formation utilizes capacitor to regulate, thereby the amount of having regulated the electronics of cathode emission.The capacitor charging is according to the size adjustment of vision signal in the used charging interval.But, because limited driving time cycle of a pixel, utilize the cell driving circuit of this method exist can not be on predetermined limit the problem in division unit driving time cycle.Therefore, the cell driving circuit of disclosed FED can not be obtained multi-stage grey scale in the 5th, 135, No. 483 United States Patent (USP)s on predetermined limits.
Therefore, an object of the present invention is to provide a kind of cell driving circuit that multi-stage grey scale can be provided for the pixel in the circuit structure of a simplification and can realize the FED of simple manufacturing method.
In order to reach purpose of the present invention, the cell driving circuit of a kind of FED is provided, it comprises: one is used to install a plurality of negative electrodes that are used for emitting electrons, is connected in the battery lead plate of earthing potential; Be arranged on N the gate electrode on described negative electrode top, N is the integer more than or equal to 2; Be used to switch N switch element of the voltage on each that puts on a described N gate electrode; With a control unit that is used to receive a vision signal and drives a described N switch element according to the size of this vision signal selectively.
Fig. 1 is the circuit diagram of demonstration according to the cell driving circuit of the FED of principles of construction of the present invention; With
Fig. 2 is what a curve chart of the operation signal electrons emitted quantity of output when showing according to transistorized switching the among Fig. 1.
With reference to figure 1, Fig. 1 has shown the circuit diagram of the cell driving circuit of FED constructed according to the invention.In this structure, the cell driving circuit of FED comprises: 16 negative electrode C11 to C44 that are installed in battery lead plate 10 upper surfaces with rectangular orientation; A resistance R 1 that is connected between battery lead plate 10 and the earthing potential GND; Horizontal direction is arranged in the first to fourth gate electrode G1 to G4 on negative electrode C11 to C44 top.
Resistance R 1 is used to limit the magnitude of current that flows into negative electrode C11 to C44.Among the first to fourth gate electrode G1 to G4 each comprises a plurality of grid hole.More particularly, first grid electrode G1 has the exposure first row negative electrode C11 to C14 and connects from the grid hole of first row negative electrode C11 to the C14 electrons emitted in the occasion that applies voltage.Mode same as described above, second to the 4th gate electrode G2 to G4 comprises that respectively exposure second is to fourth line negative electrode C21 to C24, C31 to C34 and C41 to C44, and connect second to fourth line negative electrode C21 to C24 in the occasion that applies voltage respectively, the grid hole of C31 to C34 and C41 to C44 electrons emitted.
Cell driving circuit among the FED preferably also comprises: the first to fourth nmos pass transistor T1 to T4 that is used to switch the first to fourth voltage Vdd1 to Vdd4 that supplies with first to fourth gate electrode G1 to G4; With a control unit 20 that is used to control first to fourth nmos pass transistor T1 to T4.Can be set to have identical voltage level to first to fourth voltage Vdd1 to Vdd4, but preferably they are set to have different voltage levels mutually, making increases by 2 from the quantity of the electronics of each row cathode emission nDoubly.
Vision signal VS of control unit 20 inputs, and vision signal VS is converted to the digital logic signal D0 to D3 of 4-position, so that the digital logic signal D0 to D3 of 4-position is supplied with the grid of first to fourth nmos pass transistor T1 to T4 respectively as valve control signal.Control unit 20 is made of an A/D converter or a decoder.
According to the size of vision signal VS, 4-bit digital logical signal D0 to D3 has " 0 (0000) " logical value to " 15 (1111) ".According to the size of vision signal VS, 4-position logical signal D0 to D3 can also have " 0 (0000) " logical value to " 4 (0010) ".But,, preferably use logical value " 0 (0000) " to " 15 (1111) " for obtaining high gray value.In each of the digital logic signal D0 to D3 of 4-position the occasion of logic " height " level is arranged all, it represents that it has data " 1 ".Therefore, some or all among the digital logic signal D0 to D3 of 4-position have the logical value of data " 1 ", or the digital logic signal D0 to D3 of all 4-positions has the logical value of data " 0 ".
Logical value according to the digital logic signal D0 to D3 of the 4-position that puts on first to fourth transistor T, 1 to T4 grid drives first to fourth transistor T 1 selectively to T4.First to fourth nmos pass transistor T1 to T4 drives first to fourth gate electrode G1 to G4 selectively, so that as shown in Figure 2, changes amount of electrons emitted linearly according to the size of vision signal VS.
Fig. 2 is what a curve chart of the operation signal electrons emitted quantity of output when showing according to transistorized switching the among Fig. 1.
For example, when the logical value of the logical signal D0 to D3 of 4-position is " 1 (D0D1D2D3:1000) ", have only the first nmos pass transistor T1 conducting, thereby the first voltage Vdd1 only supplies with first grid electrode G1.As a result, the negative electrode C11 to C14 from first row launches electron amount I 1
When the logical value of the logical signal D0 to D3 of 4-position is " 2 (D0D1D2D3:0100) ", have only the second nmos pass transistor T2 conducting, thereby the second voltage Vdd2 only supplies with the second gate electrode G2.As a result, launch electron amount I from the second row negative electrode C21 to C24 2
In addition, when the logical value of the logical signal D0 to D3 of 4-position is " 4 (D0D1D2D3:0010) ", have only the 3rd nmos pass transistor T3 conducting, thereby tertiary voltage Vdd3 only supplies with the 3rd gate electrode G3.As a result, launch electron amount I from the third line negative electrode C31 to C34 4
In addition, when the logical value of the logical signal D0 to D3 of 4-position is " 8 (D0D1D2D3:0001) ", have only the 4th nmos pass transistor T4 conducting, thereby the 4th voltage Vdd4 only supplies with the 4th gate electrode G4.As a result, launch electron amount I from fourth line negative electrode C41 to C44 8
At last, when the logical value of the logical signal D0 to D3 of 4-position is " 15 (D0D1D2D3:1111) ", the whole conductings of first to fourth nmos pass transistor T1 to T4, thereby first to fourth voltage Vdd1 to Vdd4 supplies with whole first to fourth gate electrode G1 to G4.As a result, launch electron amount I from first to fourth row negative electrode C11 to C44 15
As mentioned above, the invention provides the cell driving circuit among a kind of FED, wherein a plurality of negative electrodes are connected in earthing potential by battery lead plate and drive two or more gate electrodes selectively providing multi-stage grey scale to pixel, thereby have obtained a kind of circuit structure of simplification.In addition, the invention provides the cell driving circuit among a kind of FED, owing to used the transistor that drives by the individual voltage that puts on gate electrode, thereby it has the simple advantage of manufacture method.
Although in a preferred embodiment of the invention, as shown in Figure 1, four gate electrodes provide 16 brightness scale division values, and those of ordinary skill in the art should understand that a plurality of gate electrodes can provide hundreds of brightness scale division values for a pixel.
Therefore, be to be understood that the present invention is not limited to as the disclosed specific embodiment of enforcement optimal mode of the present invention, but the definition of being done, the present invention is not subjected to the restriction of the specific embodiment described in this specification in claims.

Claims (5)

1. the cell driving circuit of a field-emitter display comprises:
One is used to install a plurality of negative electrodes that are used for emitting electrons, is connected in the battery lead plate of earthing potential;
Be arranged on N the gate electrode on described negative electrode top, N is the integer more than or equal to 2;
Be used to switch N switch element of the voltage on each that puts on a described N gate electrode; With
A control unit that is used to receive a vision signal and drives a described N switch element according to the size of this vision signal selectively.
2. cell driving circuit as claimed in claim 1 is wherein set to a described N gate electrode different separately voltage levels is provided, and makes it possible to obtain 2 nGray value doubly, wherein n is the integer greater than zero.
3. cell driving circuit as claimed in claim 1 also comprises a resistance that is connected between described battery lead plate and the described earthing potential, so that restriction flows into the amount of the electric current of described negative electrode.
4. cell driving circuit as claimed in claim 3, wherein said control unit are to be made of a decoder that is used to produce the digital logic signal of N position, and described digital logic signal has the logical value that the size according to described vision signal increases continuously.
5. cell driving circuit as claimed in claim 3, wherein said control unit are to be made of an A/D converter that is used for described vision signal is converted to the digital logic signal of N position.
CN96191650A 1995-11-30 1996-11-30 Cell driving circuit for use in field emission display Expired - Fee Related CN1097279C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1995/45453 1995-11-30
KR1019950045453A KR100230076B1 (en) 1995-11-30 1995-11-30 Cell driving circuit of field emission display device

Publications (2)

Publication Number Publication Date
CN1169794A CN1169794A (en) 1998-01-07
CN1097279C true CN1097279C (en) 2002-12-25

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CN96191650A Expired - Fee Related CN1097279C (en) 1995-11-30 1996-11-30 Cell driving circuit for use in field emission display

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EP (1) EP0812464B1 (en)
JP (1) JPH11500242A (en)
KR (1) KR100230076B1 (en)
CN (1) CN1097279C (en)
DE (1) DE69621916T2 (en)
WO (1) WO1997022132A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100250422B1 (en) * 1997-07-25 2000-04-01 김영남 Cell driving device of field emission display device
KR20000019417A (en) 1998-09-11 2000-04-06 김영남 Gate driving circuit for field emission display
FR2786597B1 (en) * 1998-11-27 2001-02-09 Pixtech Sa DIGITAL ADDRESSING OF A FLAT VISUALIZATION SCREEN
FR2817992B1 (en) * 2000-12-12 2003-04-18 Philippe Charles Gab Guillemot DIGITAL VIDEO SCREEN DEVICE

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5300862A (en) * 1992-06-11 1994-04-05 Motorola, Inc. Row activating method for fed cathodoluminescent display assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103145A (en) * 1990-09-05 1992-04-07 Raytheon Company Luminance control for cathode-ray tube having field emission cathode

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5300862A (en) * 1992-06-11 1994-04-05 Motorola, Inc. Row activating method for fed cathodoluminescent display assembly

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Publication number Publication date
DE69621916D1 (en) 2002-07-25
EP0812464A1 (en) 1997-12-17
KR100230076B1 (en) 1999-11-15
EP0812464B1 (en) 2002-06-19
JPH11500242A (en) 1999-01-06
DE69621916T2 (en) 2003-02-13
CN1169794A (en) 1998-01-07
WO1997022132A1 (en) 1997-06-19
KR970030111A (en) 1997-06-26

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